Machine for testing belts



w. H. G-:RSTENSLAGER MACHINE FOR TESTING BELTS sept. 6, 1932.

Filed Feb. 9. i951 gyn/vanto@ ua Mm Cai Patented Sept. 6, 1932 UNITED' STAras` PATENT oFFicE WILLIAM H. GERsTENsLAGER, OE

& RUBBER COMPANY,` yor AKRON, OHIO, A CORPORATION ,or OHIO MACHINE EOR TESTING BELTS.y

iApplicatioII led February 9, 1931. Seria1,NO. 514,413.

The invention relates to machinesfor testing endless belts, and it has for one of its principal objects the provision ofja machine for measuring sidewise movement of anendless flat belt while the latter is operated under tension over pulleys. A; y,

One type of flat, power-transmitting belt manufactured comprises a coreof longitudinally extending cords enclosedby a rubberized fabric envelope. Certain belts'of this type are manufactured with' all of the cords twisted in one direction, whereas in other belts, the cords on one side of the median center line of the belt are twisted in one Ydirection, while those onthe oppositeside of the center lineare twisted inthe other direction. In eitherlcase,it is essential that the cords be disposed in their adjacent positions under substantially uniformtension or else the belt will'have a tendency to move sidewise when rit is operated over pulleys. Usually,y the cords are subjectedlto substantially the same tensions but it is very desirable that some means be provided for determining the tendency of a belt to slip sidewise on pulleys, in order to eliminate the sale of undesirable belts. A

The invention comprises ak pair of adjustably spaced crowned pulleys, oneof which is driven, which support an endless flat belt. One 'of the pulleys is mounted on an adjustable slide, and means are provided for moving the pulley and subjecting the belt to a predetermined tensile force. Indicating means extending transversely above the belt adjacent one of the pulleys, measures any sidewise movement of the edges of the belt during its movement over the pulleys. The indicating means are adjustable for the purpose of accommodating ybelts of` various widths. Use of the invention has eliminated thesale of unsatisfactory. flat belts, which occasionally occurred `prior to the invention.

For a better understanding of the invention, reference may now be had to the accompanying drawing, in which Fig. 1 is a side-elevational view of a machine constructed according to the invention, andV Fig. 2 is a cross-sectional view taken substantially along the line II-II of Fig. 1.

Referring to both igures, a framework is provided `having a 14 and 15 which project respectively into grooves 16 and 17 providedin opposite edges of a slide 18. Theslide is adjustable longitudinally of the framework 10 by means of a screw 20 journaled at opposite endsv in bearings` 21 and 22 forming part of the framework, and threaded intermediate its ends through a block 23 depending from the slide 18. A hand wheel 24 secured to one end 4of the screw facilitatesits operation. The upper portion of the slide 18 is provided with gibs 25 which retain a second slide 26 mounted on lthe first slide. One end of the slide 18 is provid-ed with a vertically proj ecting portion which terminates in an offset portion 31. A screw 32 threaded through the portion 30 is provided for the purpose of limiting movement ofthe slide 26 in one direction, and' the slide 26 is provided with a vertically projecting portion 33 adaptedto abut theend of the screw. A lock nut 34 secures the screw in any adjusted position. A bearing bracket 35 projects above the slide 26 and a pulley 36 isjournaled at vone end therein. j

At the opposite end of the framework 10, a bearing.v bracket 38 is provided which rotatably supports a pulley 39 similar tothe pulley 36. The pulleys 36 and 39v are adapted to retain an endless belt 37 and for tensioning the pair of elongated bars AKRON, OHIO, AssIGNOR To THE GOODYEAR TIRE sol belt 37 anangle arm 40 is pivoted to the offset portion 31on the slide 26, `as indicated'at 42, and is provided with a roller 43 adapted to cooperate with. the vertically projecting .portion'33 of the slide 26. A horizontal portion 45 of the angley arm .40, operable to apply tensile force to the belt, is provided with a weight 46 whichy may be moved along' av graduated portion of the bar. Itis evident that the weight 46 tends to movethe roller 43 against the portion 33 of the slide 26, and consequently, the pulley 36 away from the pulley 39. In this manner variable tensions may be applied to the belt.

As best shownk by Fig. 2, an angle bracket :S0-projects fromthe bearingbracket 35 and is provided with' a horizontal portion '51' 'exadjusted that sidewise movement of belts ofvarious Widths readily may be measured.

The pulley 39 1s driven in any suitable manner, as for example, by meansof asprocket Wheel 6() rigid with the pulley, over Which a chain 61 is trained'.y turn is trained about a sprocketwheel 62 on the shaft of a motor 63.

When a belt 37 is mounted on the rollers 36 and 39, and predetermined tension is applied to the belt While it is driven by the motor 63, it is evident that the scales 59 and 58 may be so adjusted that they overliethe edges of the belt. Accordingly, While the belt is traveling about the pulleys, any movement of its edges may be accurately measured.

It is apparent from the description of the machines operation that the sale of more uniform belting `is assured, and that undesirable products are eliminatedfrom commercial use. The machine constitutes a very simple means for indicating' sideWise movement of the belt, and little time is required for its operation.

Although lonly the preferred form ofthe invention has been described and shown in detail, it Will be apparent to those skilled-in the art that the invention is not so limited but that various minor modilications may be mad-e therein Without departing from the spirit of the invention or from the scope of the appended claims. It is intended that the p'atentshallcover, by suitable expression in the appended claims, Whatever featuresl of patentable novelty reside in the invention.

What I claim is:

1. A machine for testing endless belts comprising a frame, a pair of pulleys rotatably mounted in the frame for supporting an endless belt, means for driving one of thepulleys, and means for measuring the ysidewise movement of the belt as it is driven. I

2. A machine for testing endless belts comprising a frame, a pair of pulleys rotatably mounted in the frame for supporting an endless belt, means for driving one of the pulleys, means for indicating the sidewise movement of the belt as itis driven, and means for applying a variable tension to the belt.l

3. A machine for testing endless belts, comprising rotatably mounted in the frame for supporting an endless belt, means for driving' one of the pulleys, and means for measuring the sidewise movement of the belt as it is driven. v 4. A machine for testingl endless belts com- `mounted fn `the .endless belt, meansfor .driving Yone of the The chainGl'in prising a frame, a pair of pulleys rotatably mounted in the frame for supporting an endless belt, means for driving one of the pulleys, andv means for indicating the sideyvvise movement of the belt as it is driven, said latter means including a member extending transversely of the belt.

'5'. A machine for testing endless belts comprisingv a frame, a pair of pulleys rotatably frame Jfor supporting an pulleys, and means for indicating the side- Wise movement of the belt as it yis driven, said means including a member extending transversely of the belt, and individual scales adjustably mounted on the member adjacent the paths in Which the edges o t the belt travel.

6.' A machine for testing endless belts comprising a frame, a slide on the frame, means for adjusting the slide, a second slide mounted on the first slide, a pulley mounted on the second slide, a second pulley mounted on the frame in alignment with the first pulley, said pulleys being adapted to support an endless belt, means for driving one of the pulleys, meansfor varying the position of the second slide in order to vary the tension on the belt, and means for measuring any sidewise movement of the belt. l

7. A machine for testing endless belts comprising a frame, a slide on the iframe, means for adjusting the slide, a second slide mounted onthelirst'slide, a pulley mounted on the second slide, a second pulley' mounted on the frame in alignment with the irst pulley, said pulleys being v,adapted to support an endless belt, means for driving one of the pulleys, measuring means for varying the position of the second slide in order to vary the tension on the pulley, and means Jfor measuring any sideivise movement of 'the belt.

In Witness whereof, I have hereunto signed my name at Akron, in the county of Summit and State of Ohio, U. S. A., this 4th day of February, 1931.

"WILLIAM H. GERSTENSLAGER.

a frame, a pair of crowned pulleys, v-

llo 

